Following the first demonstration of fiber-based piezoelectric element that can be interfaced with external circuits in both transmitter and receiver configurations, we continue to explore the refinement of the fabrication process on novel and high performance structures: fibers with circular and rectangular cross sections have been fabricated to control the acoustic wavefronts. Fibers containi...

Single-crystalline nanobelts and nanowires of trigonal selenium (t-Se) have been selectively synthesized in micellar solutions of nonionic surfactants. In particular, t-Se nanobelts about 30 nm in thickness were obtained in micellar solutions of poly(oxyethylene(20)) octadecyl ether (C18EO20), whereas t-Se nanowires were obtained in micellar solutions of poly(oxyethylene(10)) dodecyl ether (C12...

One of the simplest geometries for micro-mixers has a T-shape, i.e., two inlets join perpendicularly mixing channel. The cross-sections channels are usually square/rectangular, as straight walls facilitate experimental and modeling analysis. On contrary, this work investigates through Computational Fluid Dynamics effect cross-section with lateral inclined an angle α such inclination may stem fr...

Simply supported steel beams with rectangular hollow section (RHS) are investigated, taking into account large twist and cross-sections distortions. A closed-form expression for the critical value of external couple inducing lateral torsional buckling is found; homotopy perturbation method (HPM) used to investigate post-buckling non-linear path. The linear paths given by HPM compared those of: ...

Diyala Governorate was recently exposed to high flood waves discharged from Hemrin Dam. Since the dam at its full capacity during period, these were River. Because of reduction in River 750m3/s, cities and villages on both sides river banks inundated. Thus, study's objective is design a escape out River, discharge wave through it. The simulation done by using HEC- RAS software. Two hundred twen...

We provide a compendium of the quantum mechanical equations for photon emission rates, absorption cross sections, and scattering sections. For each case, different that apply discrete or continuous electron states emitting, absorbing, material are given.

Analytical solutions are presented for laminar fully-developed flow in micro/minichannels of hyperelliptical and regular polygonal cross-sections. The considered geometries cover a wide range of common simply connected shapes including circle, ellipse, rectangle, rhomboid, star-shape, equilateral triangle, square, pentagon, and hexagon. Therefore, the present approach can be considered as a gen...

In seismically active areas, knowledge of the actual behavior bridges under seismic load is extremely important, as they are crucial elements transport infrastructure. To assess their resistance, it necessary to know key indicators response. Bridges built before adoption standards for detailing may still contain structural reserves due properties used materials and construction approach. For ex...